"The deuce!" he exclaimed, with his hand over the transmitter so
that his voice would not be heard at the other end of the line.

"What's the matter?" I asked eagerly.

"It was Mrs. Annenberg--I am sure. But she was too keen for me.
She caught on. There must be some password or form of expression
that they use, which we don't know, for she hung up the receiver
almost as soon as she heard me."

Kennedy waited a minute or so. Then he whistled into the
transmitter. It was done apparently to see whether there was
anyone listening. But there was no answer.

"Operator, operator!" he called insistently, moving the hook up
and down. "Yes, operator. Can you tell me what number that was
which just called?"

He waited impatiently.

"Bleecker--7l80," he repeated after the girl. "Thank you.
Information, please."

Again we waited, as Craig tried to trace the call up.

"What is the street address of Bleecker, 7180?" he asked. "Five
hundred and one East Fifth--a tenement. Thank you."

"A tenement?" I repeated blankly.